Patent GB-1012603-A (GB)
Title: Data recording apparatus
Inventor: APPLEBY JOHN PERCY
IPC: G01D15/04
Filed: 1962-11-13
Abstract: 1,012,603. Selective punching machines. LEA RECORDER CO. Ltd. Jan. 8, 1964 [Nov. 13, 1962], No. 42765/62. Heading B4B. [Also in Division G1] A selective punching machine especially for recording changes in depth in rivers comprises means for continuously moving a pair of cylinders 14, 15, Fig. 1, having rows of code holes 16 on the peripheries thereof, a series of punches 27 each aligned with a row of holes 16, tape supply and take-up drums 33, 34, Fig. 5, and guide means for locating the tape adjacent the punches, and means for indexing the tape and for locking the cylinders at predetermined intervals of time. The holes 16 are arranged in decimal binary code and the cylinders 14, 15 have depth scales 17, Fig. 1, associated with fixed pointers 18. The cylinders are rotated through gearing from a pulley 20 around which is wrapped a steel tape having at one end a float and at the other end a counterweight. The gearing consists of an input gearing 22 to the cylinder 14 and two compound gear trains 23 each having a reduction ratio, e.g. 10 to 1, which drive the cylinder 15. The gear trains 23 are carried by pivotallymounted arms 24, Fig. 5. The punches are slidably mounted in a carrier plate 26. Tape to be punched is led from drum 33 between guide and punch plates 29, 30, Fig. 1, past a tape traverse drum 35 to drum 34 which is rotated from spindle 44. The drum 35 is carried in arms 37, 37a pivotable periodically about a spindle 38 by means of a pivotallymounted cam bar 41, Fig. 5, operable by a cam 43 on a spindle 44. The drum 35 is provided with a ratchet wheel 58 engageable by a pawl 57, operable from a peg 53 on spindle 44. Also mounted on spindle 44 are cams 45, 46 which co-operate with cam bars 47, 48 respectively. Cam bar 47 carries a pawl 49 aligned with a ratchet wheel 50 rotatable with cylinder 14. Cam bar 48 carries at its free end a cam follower aligned with a cam disc 51 associated with cylinder 15; cam bar 48 is also connected to spindle 52. Spindle 44 is driven by a motor 60, Fig. 1, which is energized and de-energized by means of a timer 59 to operate a microswitch 64, Fig. 7. A microswitch 65 is periodically energized and de-energized by a star wheel 68 movable by a pin 69 on a gear wheel 70 carried by spindle 44. An end of operation switch 66 is operable by a pin 73 (not shown) on spindle 44. Switches 64, 65 and 66 are arranged in a circuit as shown in Fig. 6. Operation.-When timer 59 operates switch 64, motor 60 starts and spindle 44 commences its revolution, at the same time starting drum 34 to tension the tape. Spindle 44 continues to rotate and cylinders 14, 15 become correctly aligned by means of cam bars 47, 48. As spindle 44 rotates further, punch carrier plate 26 is pivoted towards the cylinders, which are held stationary, to punch the tape. Towards the end of one revolution of spindle 44, switch 65 is changed over to break circuit containing switch 64. The revolution of spindle 44 is completed, however, by shunt circuit 72. Ratchet wheel 58 is now turned to move the tape for the next punching operation. Further rotation of spindle 44 causes switch 66 to break circuit 72.